pegmatite

noun peg·ma·tite \ˈpeg-mə-ˌtīt\

Definition of PEGMATITE

: a coarse variety of granite occurring in dikes or veins

— peg·ma·tit·ic \ˌpeg-mə-ˈti-tik\ adjective

See pegmatite defined for kids

French, from Greek pēgmat-, pēgma something fastened together, from pēgnynai to fasten together — more at pact

First Known Use: circa 1828

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